About.com and PopSugar.com are both good sources for pictures of yoga poses. About.com offers illustrations for more than 100 yoga poses in five different subcategories, and PopSugar.com offers several dozen photos of poses.
About.com’s An Index of Yoga Poses includes yoga poses with illustrations and instructions arranged by difficulty, home practice sequences, areas of anatomical focus and alphabetically by Sanskrit names. Step-by-step instructions with each pose guide the site visitor through the pose.
PopSugar.com offers a guide of essential yoga poses, ranging from the upward facing dog pose to the four-limbed staff and the three-legged downward facing dog poses. Detailed instructions for doing the pose are included with each photo.